Malicious PDF — malware analysis report

Static analysis result for SHA-256 27f1c9880f39f541…

MALICIOUS

PDF

33.9 KB Created: 2021-06-20 03:46:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 79c1bc1eceddffaf3b3632852209c589 SHA-1: d903fc32d57ee891b63ef44be7b2314953ebe25a SHA-256: 27f1c9880f39f5411f39f45a6d08d0d931f01075d0a13611512c85d035ee2831
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document contains numerous links to external resources, many of which are structured as SEO-optimized PDF links, suggesting a link farm or content-spinning operation. The document body explicitly mentions 'Free Roblox Account Generaotr' and includes URLs pointing to similar game-related hacks and currency generators. This indicates a social engineering attempt to trick users into visiting malicious sites or downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.co/app/431946152/free-roblox-account-generaotr-game-hack PDF link annotation
    • http://gts.edu.gh/library/repository/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/no-robux_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-cheat-engine-check-cast-v3_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-free-spins-cheat-deutsch_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-tiktok-coins_GM835599320.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-hack-roblox-ninja-legends_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-bandana-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-free-spins-link-fb_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/como-hackear-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-shirt-templates-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EF3 22084 bytes
SHA-256: fe737af1e979a15aad1d34d9a7660c92a4316408a0befdd6f54be7acab847100
font_01_sfnt_off00005ff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF9 18896 bytes
SHA-256: bb9e6463d1c81a2a547d1690b1a8e73c4c12e3f7068d53863442e88dfdb98424

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